Fuel-heating system.



APPLICATION flLED OCT. I6, |916.

J. V. GIESLER. um HEATING SYSTEM.-

Iatented Apr. 15, 1919i.

2 SHEETS-SHEET L.

Fig". .v

, y ozneqff 1. v. GIES'LER.

FUEL HEATING SYSTEM. @PPLICATION FILED OCT. 1'6, i916.

' Paten@ Apr. 15, 19191.

2 S'Hzzs-surzr z atroz n ntf .d temperature of the coolingmedium, shown as' means for regulatingthe flow of cooling means for performing' this function might be employed with equal facility. While any suitable mechanism for regulating the flow of the cooling medium maybe employed, a preferred construction comprises a by-pass 6 between the manifold 2 and the conduit 7 intermediate the` radiator and circulating pump, and means for directing the How of said cooling medium through either the radiator or the bypass, or both, as the tem-- erature needs of the cooling medium may.

etermine.4 In the construction 'illustrated on vthe drawing, a valve-housing 8 'ispro' vided 'intermediate the manifold 2 and the .radiator 3,- from which valvelhousing leads 'the bypass 6. Within the valve-housing 8 are provided two ports 9 and .10 controlled by valve members 11 and 12 respectively.

The port 9 with its'valve member 11.controls the iiow of thelcooling medium from the valve-housing into theby-pass 6,'while the port 10 with its valve member 12 controls. the How of the cooling medium from the valvehousing linto the radiator- 3. Said valve members 11 and 12 may be of any suitable type, being illustrated as well-known forms of seating valves, and are preferably connected-by an integral valvefstem 13,'whereby "they, are causedto move in unison. -In the form shown said valvemembers are under suitable construction that is subjected tothe j -cooling -medium, whereby the proportionate vflow of such medium through the radiator and by-pass is directly 'determined by the temperature of'this medium'. To .this end an expansible and contractible vessel 14, preferably constructed of corrugated resilient metal, such as brass, is shownl as having one end `rigidly lmountpd in the valve housing by the bracket 15 andv having its opposite and movable end wall 16 connected with the valve members v11 and 12. Vessel 14' is charged with aV thermosensitive duid refer-" ably atl a pressure below that to which the' vessel is exteriorly subjected, whereby yunder normal Wirking conditions said vessel is f somewhat contracted by the exterior pressure thereon. Vessel' 14, when fully eX- ]anded, closes valve 11 and opens valve 12.

hould vessel 14 leak, therefore, the pressureA within Aand without the lsame becomes equal- I ized and the resiliency 'inherent in its wall causesexpansion of thevessel, closing valve 1'1. and opening. valve 12;.

Any suitable meansfor supplying .fuel to the engine may be employed.v .In the embodiment.illustratedfon the drawing, .20 rep-l resents a fuelfsul plytank. This tank may be leither the mam storage tank used in vconferred formof vacuum or pressure fuel feed system. 4F rom tank 20 the fuelis supplied medium through the system, although other to the engine cylinders through pipes 21 and;k

22,'carbureter 23 and the intake manifold 24, any suitable form of throttle valve being employed intermediate the carbureter. and

the intake manifold, its operating mechanism being illustrated at 25. In accordance with one embodiment of, this invention, a

. heater for the fuel is interposed between the pipes21' 'and 22. Any suitable form .of

eater may be employed, the illustrated 'con' vstruction comprising a casing 26 `within which is positioned a second .andsimilar casing 27 intersected by a plurality'of tubes 28.. The fuel may pass around the exterior of the casing 27 aswell as through the tubes.

28. Means are provided for -supplying .a

lheating medium to this heater, such heating' medium preferably.' being the ,cooling me.

dium circulated in heat-interchanging relacommunicating at one end with the manifold 2 and at its opposite end w-ith the interior To this' endv l of the casing 27 and a second pipe 31 comi municating at one end with the mterior of the casing 27 and at its opposite end with the intakeof the circulating pump. There by cooling medium in its heated condition,`

' as it flows from-heat-intercha'ngingA relation to the engine, passes through thev casing 27,. surrounding the tubes 28 and delivering its .heat to the fuel as it passes through said tubes and around the exterior of the casing 27. From the latter casing the cooling me- Cum returns to the circulating pump 4. i

Under normal working conditions the temperature of the coolig medium flowing through vthe system will be maintained sub` stantially constant, whereby the fuel will be preheatedto. a substantially: constant temperature before it is supplied to the carbureter.' :To positively prevent overheating of thefuel under abnormal conditions, it is vdesirable'to provide means controlling the How of theheating medium through the by- 4-pass heretofore described, such. meansgfpret erably takin A the folfni;y of a thermosensitively'contro led valve. "f In.the form shown the the'rmosensitive member for operating -120 said `valve is shown as subjected to thesaid medium as'it flows throughthe by-pass, butA this-thermosensitive member could bef if de- -l l' sired, and in some ca'sespreferably is, ex

posed directly to the fuel. In the illus-4 'trated embodiment o f the inventioina casing 32 is interposed inthe by-pass between thejmanifold 2 and th'epipe '30, such casing .being provided interiorly with a port 33 y controlled by a valve member 34. Port 33 fand" valvemember 34 control the flow of heating. medium` through the by pass. While any suitable'form of valve may be employed, a well-known type o-f seating valve has been illustrated. Thermosensitive ed at one end in the casing 32 by" a bracket 36'and having at its o posite end a movable end-wall 37 connectedlwith valve member 34. `Vessel 35 is charged with a thermosensitive iiuid, preferably at a pressure below' that to which the .vessel is normally exteriorly subjected.. Thereby is the vessel,

under normal conditions, somewhat -con tracted. When this vessel isl fully expanded, however, valve 34 is closed. Should the vessel leak, therefore, the pressure within vand without the same becomes equalized,

whereby said vessel, owing to the resiliency inherent in its wall, expands to close valve 34.

Referring in'detail to Fig.' 2,' a modified .embodiment of the invention is illustrated wherein the heater takesl the form of a jacket-40 for the fuel reservoir of the car- .bureter 23. Said carbureter may be of any -suitable construction, that villustrated com-' prising a noz`zle 41, a needle valve 42 and an lair intake 43. Fuel. is supplied to the reservoir 44 through a port 45 communicating with pipe 22, and port 45 is 'controlled by a `needle valve 46 actuated by a float 47. '25

illustrates the .usual throttle valve. The heatingymedium, z'. e., the cooling medium in itsheated condition as it flows fromheat interchanging relationuto the engine, is passed through the jacket 40 of theV carbureter, pipes 48 Vand 49, communicating respectively with the manifold 2 and the pump 4,.

' being tappedinto opposed portions of' the jacket 40. Pipe 48 may communicate di- .rectly 'with valve-housing32, or a heater for the fuel may be interposed in the system between the tank 20.andthe carbureter, as

illustratedon the drawing.

In operation, inboth embodiments fuel is supplied the engine cylinders from tank v20, flowing through pipes 21 and 22, the

theiengine cylinders.

'carbureter 23, and intake manifold 24 into When the engine is first `started, 'the coooling medium flowing through the engine jackets will be relatively cold, vessel 14 will be contracted, .valve 11 will be wide open and valve 12 'entirely closed. The cooling medium will low from manifold 2 through by-pass 6 back to theA jackets. As the vtemperature of the engine rises, the vtemperature of the coolingV mej dium will correspondingly rise, and evenn tually vessel 14'will begin to expand, proes.

vportionately closing valve 12` and` opening valve 11, wherebyl some of the coolinme-` dium will be directed through the ra. iator 3. Vessel 14 will thereafter move valves 11 and 12 until it proportions vthe flowr of cooling medium through the radiator and by-pass so.v as to maintain a substantially uniform temperature of said cooling me' dium'. Some of said cooling medium'in'-its heated condition, as it flows from 4heat-in-v terchanging relation to .the engine, will ioW throughthe by-pass provided byv casing 32,` pipe 30, casi-ng 27, and pipe.31 in Fig. 1, or casing`32,pipe.30, casing 27 (if provided), pipe`48, jacket 40 and pipe 49 in Fig. l2.' This medium` as it flows. through the casing27 will give upsome of its heat to the fuel as it passes around the said casing and through ,the tubes 28 in the embodiment of Fig.' l, and give up lsome of its heat to the fuel asit flows through the-"carbureter, if a jacket therefor be lincluded in the system'as illustrated in Fig. 2. If, for any reason, the temperature of the medium Howing through the by-pass should rise above a predetermined degree so as to produce a llability of the4 fuel boiling, vessel 35 will expand, closing valve 34 and preventingv fur-` ther flow ofheating medium through the by-pass until the temperature thereof has"k decreased to the requisite extent.

Shouldv either of the vessels 14 or 35 leak,

ywhereby there is a failure .of the temperature control, said vessels, owing to the resiliency inherent in the same, will become,

fullyv -expanded upon equalization of theA pressure within and without the same, moving their vconnected vvalve members to positions of safety, z'. e., directing all of the cooling medium through the radiator lin the one case, and preventing flow vof the heating medium through the heater or carbureter jacket, or both, in the other case.

Vhile this mvention has been described as embodied in a system `employing a cooling i medium for the engine cylinders as a heat- .110A

ing Imedium for the fuel, it willbe understood that the invention in all its features is not restricted to such an embodiment, but

'y thatv certain .featuresgthereof are of equal utllity when applied to the use of the eX- haust gases of the engine as a heating medlum for the fuel. rlhe invention is not to 4be restricted tothe embodiments illustrated ion the drawings, as other embodiments will readily suggest themselves to those skilled" .inthe art, while certain parts thereof are capable of use without other parts thereof. The limits of the invention are accordingly to be determined by reference to the claims heretoappended.

What is claimed is: j

1. In combination with an internal-com- 'bustion engine, means for supplying said enginewith liquid fuel, means for circulatrelation to said engine, means' forv circulati ing saidmedium in its heated condition in heat-interchanging relation 'to' said fuelsupplying means, f andl thermosensitively controlled means for regulating the-'temperaf ture of said cooling medium'. e

2. In combination with an internal-combustion engine, a'l system for circulating a l cooling vmedium in heat-interchanging relation to'said engine, a heater connected into said system and through which liquid fuel for "said engine is passed, andthermosensiltively controlled means for regulating the fuel lreservoir of said carbureter, `and therl mosensitively controlled means for regulat.

ing the. temperature of said cooling medium.

'- bustionfenginejand itslcarbureter, a `jacket .by-passk inclujin lfsaidfheater andarbu;

4; combination with Ian internal-comy bustlon engine and vits carbureter, a heater -forthe liquid fuellof. said 'en 'ne, a system for circulating a-,cooling me iuminheatinterchanging yrelation to said engin'e, means for circulating 'said medium -in/its heated sitively controlled means for, regulating the4 temperature of said cooling medium.'

5. In 'combination withan internal-combus'tion engine, a heater for the liquid fuel4 thereof,"asystemv for. circulatingl a cooling' mediuml in heat-interchanging. relation 'to ed condition -i passed, and thermosensitively fsaid cooling medium. njeomblnation 'with an 'ir'nier-nal-conisystenffori 'icirculatin a 4cooling Vmedium in by-pass .including said 'carburete'\r j anket. and

through-which said medium finits heated." condition ispassed, and thermosensitively controlled" 'means' for regulating'-l the temperature ofsaid'jjcoolingmedium. fj l'7.- In `'combination withan 'internal-'com'- i bastionl enginefandfits 'carbnreter, a jacket te Said@ engine',- a' System f'-, irvletma-a ing mediuml heati-irrt. erchangingv rela .wleiden-; .a includmgfsaid: 'e

for the fuel reserviifof' said carbureter," a heater for the Vliquid fuel of'sad enginepa systexnfor circulating. a lcooling mediuminf heat-interchan 'ng .relation"to said engine, -fa

reterej anke't in its heated 't ru'z'hrvthchswid medium itiinniA i'sypassbd', and thermoseiisitivelyy :controlled-means'- for regulating the temperature vl; f"sa i d cooling medium.

8." combination' with'an 'internal-combustionenginq-a heater for the fuel thereof, a

regulating ythe flow-.of said. medium through .for regulating the-temperature' o ing- 'medium flowing. through's .and thermosentitivelycontrolled4 saldjb -pass j sald engine,1a by-pass 1ncluding. `saidjheater;. and through which said medium in itsheat-q controlledmeans for regulating temperapassed, thermosentitively controlled me asada-Lf thermo-ensear I measforrigu'la. in. thftmp tu'rge'vt .the

@Moeheid-.bepm

ving medium 'owin rough said system,

and thermosensitive y controlled means for 9. In combination withan internal-coml bustion engine, a, heater for `the uel thereof, a system; for .circulating a coolingtme- H dium in heateintercha'nging relationto saidv engine, a lay-pass including said .heater andz. through. which said medium-.in itsheated condition 'is passed, 'thermosensitively consaid 'by-passi trolled means for regulating-the teiilipera#'..y ture'of the mediumffloyving through.

saidjsystem, andthexfmo'sensitive meansconf 85,;

.trolled fby the .temperatureof'the' mediumv pass.

' 10.5 *In combination withan 'internal-comfo acooling" medium-1in, heat-interchanging' A-re-f; l 'A 'lation to. s .aic er` 1 gine, 4 abypass-including condltlonin heat-mtcrchangm .relation to saidheater andfcarbureter, an thermosens 'aidsmedium in its' heated con'giitionis A passedg thermosensitively controlled means [Systems news-M190 regulating the llowof said mediumjthrough-- 11'? n combination withiafn internalfeome said. carbureter-jacliet V'and through whi medium in its heated. conditi fr'rgulning' the temperaturen-.ima

ing 1i medium-z flowing' through Said-*SWW andlthermo'sensitive means eontrollgdlglby I,the

fol-regulating he-:now: of said 13. In combination with an internal c0inbustion engine and its caibureter, a jacket for` saidcarbureter, a heater for the fuel of saidengine, a system for circulating a cool- Ling medium in heat-interchanging relation to said engine., a by-pass including said carbureter-jacket and heater and through which said mediurniin its'heated condition ispassed, thermosensitively controlled-means for regulating the temperature' of the cooling medium flowing through said s ystem,

and thermosensitive meanscontrolled by the temperature of the medium flowing through said lby-pass for regulating the flow of said medium through saidvby-pass. 14. In combination with an internal-combustion engine, a heater for the fuel thereof, asystem for circulating a cooling medium in heat-interchanging relation to said engine, a by-pass including said heater and through' which said medium in its heated condition is passed, and thermosensitive means controlled by the temperature of themedium flowing through said ley-pass for regulating the flow of 'said-medium through the same,

15. In combination with an internal-combustion engine and,l its canbureter, a jacketI for said carbureter, a system `for circulating a cooling-medium in heat-iterchanging relation to said engine, a by-pass including -said carbureter-jacket and through which said medium in its heated condition is passed, and therinosensitive means controlled 'by the temperature `of the medium flowing through said Iby-pass for regulating the flow of said medium through the same.

- 16. In combinationwith `an internal-combustion engine and its canbureter, a jacket for said carbureter, a heater for the fuel of said engine, a systeml for circulating a cool- -ing medium in heat-interchanging relation to said engine, a by-pass inclu-ding said carbureter-jacket and heater and through which said medium in its heated condition is passed, and thermosensitive .means controlled by the temperature of the medium flowing through said by-pass for regulatingv the flow of said medium through the same. j

17. In combination with an internal-com bustion engine, la heater for the'liquid fuel thereof, vmeans for circulatin,i a4 heating mediumy through said heater, means controlling the iiow of heating medium throughsaid heater, and means automatically controlled by thetemperature of the medium flowingthrough said heater for operating said controlling means. l y

18. In combination with an internal-combustion engine and its carburetor, a jacket for the fuel'reservoir of said carburetor,

means for circulating a heating medium through said carbureterfjacket, means con-` trolling the now. of heating medium through said carburetor-jacket', and means automatically controlled bythe temperature of the control.

medium {iowing4 through said carbureter zustion engine and its carbureter, a jacket ing a heating`mediu1 n inheat-interchanging Y relation to said fuel-supplying means, and thermosensitiye means controlled .by thel temperature of said medium for regul 21. 'Incombination with an internal-combustion yengine and itscarbureter, a. jacket `for said carburetor', a system for circulating a cooling medium .in heat-in'terchanging re- 'lation to said engine, a by-pass including said vcarbureter-'jaclet'and through which said medium inl its heated' condition is passed, and thermosensitiyely controlled means for regulating the flowof said inedium through said 'by-pass'. a

ating the 'iow thereof in heat-inter'changing j relationto said fuel-'supplying means.

22.-- In combination with an internal-com.

lbustion engine and its carbureter,.a jacket.

lfor the fuel reservoir of said carbureter,

lmeans for circulating a heating medium through said carbureter-jacket, means controlling the How .of heating medium through said carbureter-jacket, and thermosensitive means for operating said controlling means.

23. In combination with an internal-com-l bustion engine,-mea'ns for ysupplying said engine with fuel, means for circulating. a cooling medium in heat-interchanging relation to saidv engine, a lay-pass for circulating 1 i said medium in its heated condition in heating means, a valye in said by-pass, and a thermostat for operating said valve, said thermostat being so constructed as to close saidvalve upon failure of` the temperature control. l.

, 24. In combination with an internal-combustion engine, jineans for supplying said engine ,With-fuel'l means for ciroulatinga `interchanging relation toY said-,fuel-supplyheating mediunfny heat-interchanging rela.-l ,j

tion with said .fuel-*supplying means, av Valve controlling said circulating vmeans,` end a thermostat f for operating said valve, saidthermostat being so constructed .as to close said valve uponfailure ofthe temperature 25. In combination with an inter`nal-c0m` l bustion engine, ai heater through which the liquid fuel for said engine is passed, a sys bustion engine, a heatlthrough which y'the tem for circulating a 'cooling medium'` in liquid fuel` for said engine is 1 assed, means A 'heat-interchanging .relation to said engine, -forcirculating, aA heating .me through means for' circulating said medium in its said heater, and therinosen"sitiyely' controlledl -5` heated condition' through said heater, and y,means for maintaining said-heating'mediuml thermosensiti-vely -controlled Ijmeans for' at a substantiallynniformtemperatura* maintaining said' niedium' in its heated 'con- In testimony-whereof 'I have signedy this dition at a substantially uniform tempera# specification. I v-ture." 10 -a 26. :In combination with anint ernal-com-v GIESLER; 

